SOLUTION: Thor's avverage driving speed is 14 kil. per hour. faster than Doug's. In the same length of time it takes Thor to drive 348 kil., Doug drives only 292 kil. what is Thor's average
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Question 108846: Thor's avverage driving speed is 14 kil. per hour. faster than Doug's. In the same length of time it takes Thor to drive 348 kil., Doug drives only 292 kil. what is Thor's average speed?
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
DISTANCE=RATE*TIME.
OR TIME=DISTANCE/RATE.
348/(X+14)=292/X
NOW CROSS MULTIPLY.
348X=292(X+14)
348X=292X+4088
348X-292X=4088
56X=4088
X=4088/56
X=73 SPEED FOR DOUG.
348/(73+14)=292/73
348/87=4
4=4
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